Baker&#39;s oven.



. W. P. PETERSEN.

BAKERS OVEN.

APPLICATION FILED PEB.24,1908.

Patented Nov. 15,1910.

4 SHEETS-SHEET 1.

W. F. PETERSEN.

BAKER'S OVEN.

APPLICATION FILED PEIB.24, 190B.

' Patented'N0v.15,1910.

4 BHEETBSHEET 2. I

W. F. PETERSEN.

Patented Nov. 15, 1910.

4 SHEETS-SHEET 3.

w 0 m 6 Q N. W 0 0 W. FIPETERSEN.

BAKERS OVEN.

APPLIGATIQN FILED PEB.24,1908.

Patented Nov. 15,1910.

4 SHEETS-SHEET 4.

WILLIAM FERDINAND PETERSEN, OF CHICAGO, ILLINOIS, ASSIGNOR TO THEPETERSEN OVEN COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

BAKERS OVEN.

Specification of Letters Patent. Patented N 15, 1910, Application filedFebruary 24, 1908. Serial N 0. 417,433.

To all whom it may concern:

Be it known that 1, WILLIAM FERDINAN PETERSEN, a citizen of the UnitedStates, and a resident of Chicago, in the county of Cook and State ofIllinois, have invented certain new and useful Improvements in BakersOvens, of which the following is a.

full, clear, and exact description.

My invention relates to bakers ovens, and one of .its objects is toprovide a movable hearth by means of which the bread, or other productsof a similar character, can be fed to or withdrawn from the oven quicklyand conveniently, or shifted longitudinally to any position within thelength of the oven desired.

Another of its objects is to control the a heat, by partially or whollyclosing the heatflues extending lengthwise through the upper part of theoven, and partially or wholly opening enlarged smoke passages in theside-walls of the housing of the oven and thus shunt the heated productsof combustion from the oven out through saidside- Walls; substantiallyas'hereinafter fully described, and as particularly pointed out in theclaims.

- heatflues of the oven.

My invention relates to a bakers oven in whlch the products ofcombustion are, preferably, generated in two corresponding firechambersA, which are situated in the rear of the structure next the foundation,and from each of. which said products of combustion pass horizontally tothe front through parallel longitudinal twin passages a, that areseparated by a vertical partition (9 extending from the front wall ofthe housmg back to the fire-chamber, in the vertical plane of the centerof width of the latter.

At the front these twin passages a extend laterally in oppositedirections and then extend longitudmally in the same horizontal planeback past the sides of the firechamber to the rear wall of said housingwhere they communicate with the lower end of Vertical shafts 0. Near theplane of the top of the baking chamber B, which latter is locatedbetween the front and rear walls of the housing thereof, a transversehorizontal chamber C is made in said rear Wall into Which the productsof combustion are discharged from the upper ends of the shafts 0, c, andin the side-walls of the housing two longitudinal auxiliary flues d, d,are made, with the rear ends of which the ends of the transverse chamberC communicate. The forward ends of these flues d discharge into alateral chamber D in the front wall, from whence the products ofcombustion flow back to the rear of the structure again through a seriesof longitudinal passages E, E, in the arch of the oven, to chimney F.The heated chamber constituting the over proper is heated by the passageof the products of combustion therethrough in any suitable manner, but Iprefer to heat the same by passing said products of combustion through aseriesof pipes G, which extend longitudinally through the upper portionof the oven, and have their rear ends communicate with and receive theproducts of combustion from chamber C and their forward ends communicatewith and discharge into chamber D. My improvements are designed toregulate the current of heat flowing through this series of pipes G bymeans of a series of dampers or valves f, 7, consisting of suitablemetal plates, whose low'er edges are secured to a transverselyreciprocal bar H, which is so placed in the chamber C, that the valvescontact with the side of said chamber from which the pipes G extend.Pipes G are, preferably, equi-distant and so said valves 7 are placedatsuch a distance apart that by moving bar H longitudinally in theproperdirection, they will pass in front of the mouths of the pipes G to openor close the same, to the extent desired. Bar H extends out through theside-walls of the housing and is provided with means for reciprocatingit, consisting of a lever of the third class, whose upper end is,fulcrumed to suitable lugs secured to and rojecting from the outersurface of said si e-wall, and to which the adjacent end of the bar ispivotally secured at a suitable point just below the fulcrum.

The intake ends of auxiliary flues d communicating with chamber C, areclosed by means of dampers I, which are, preferably, circular, and aresecured in any suitable manner to'the end of an arm h, projecting from arock-shaft 7a, which latteris journaled in suitable bearings in theside-Walls of the structure preferably in about the plane of the lowestsegment of said flues. These rock-shafts is are each provided with aslotted arm K extending upward at an angle to the arm h, which areconnected to the bar H by means of lateral fingers m projecting fromsaid bar, through the slots in said arms K. Dampers I arecorrespondingly arranged with relation to bar H, and also with relationto valves f, so that when said valves are in position to open pipes G,dampers I will close the auxiliary fines d, d, and thus any surplus heator products of combustion will be shunted into said auxil-.

iary flues.

The front end of the oven B is provided with a door M, which is hingedto the arch of the door-opening, and is adapted to swing inward andupward to permit access to the oven, or swing downward until its loweredge contacts with the inner horizontal edge of a sill-plate n toclosethe same. The bread introduced into this oven is supported upon amovable hearth, which consists of a series of transverse metal plates 0,the width of which correspond practically to the width of the oven, andthe length of which is comparatively short, say not more than ten totwelve inches. The transverse edges of these plates are hinged to eachother by means of lugs 0, secured to and projecting from the edge of oneplate, and lugs 11 projecting from the adjacent edge of the other plate.Lugs p are placed nearer together than the lugs 0, and said lugs areinclined toward each other so that the lugs p will come between the lugs0 and are connected thereto by a pintle P, the axis of which is in theplane struck midway between the edges of the two plates. There are asuflicient number of these hearth-plates, connected to each other in themanner just described, to extend from the front of the oven, where theypass around a polygonal drum Q and to the rear end of the oven where thehearth passes around a corresponding drum B. Drum Q, 1s mounted upon asuitable shaft having bearings in the side-walls of the front of theoven, and drum R is mounted upon a shaft that is journaled in hearingsin the side-walls of the rear end of the oven, preferably in a planeslightly above the horizontal plane of the shaft of flat faces of thesides of the drums Q and R? correspond in width to the distance betweendrum Q. The

recessed to accommodate the passage of the hinges of said plates.

Between the lugs 12, p, of the hearthplates, I journal upon the pintleP, small friction rollers, WhlCh are adapted to roll upon the upperedges of suitable I-beams q, that extend longitudinally between theupper and lower stretches of the endless hearth, and are supported bytransverse I-beams 1' that bridge across the oven, and have theirends'support'ed in the side-walls of the same. I prefer to .have the topflanges of the ends of I-beams g extend beyond the extremities .of thewebs thereof, and bent downward, so that as the hearth revolves,friction rollers S can strike and ride upon the upper edges of saidI-beams without meeting with opposition. The shaft X of one of the drumsQ, is, preferably, extended at one or both ends beyond its hearings tothe outside of the oven where it is provided with a suitable pulley orsprocket wheel Y that is connected, through the medium of a belt orchain Z, with any suitable source of power. When the loaves are beingplaced on the hearth the latter is moved slowly toward the rear of theoven where it remains during the baking process, after which it isreleased and is permitted to gravitate forward as fast as the bakedbread can be removed.

Because of the ability .of the baker to move the bread to dilferentpoints within the length of the oven, by means of my improved movablehearth, and control the heat therein, better results are obtained whenbaking because, as is well known to the bakers trade, it is diflicult tomaintain an even heat in all parts of an oven, even under the'mostfavorable conditions. Besides this, the introduction and removal of thebread from the oven is greatly facilitated and made both easier and morerapid.

What I claim as new 1s 1. A bake oven comprising a baking chamber, ,aseries of flue-pipes extending through the upper portion of saidchamber,

a by-pass flue, a union mixing-chamber arranged transversely across oneend of said baking chamber from which both said flueboth said flue-pipesand said by-pass receive the products of combustion, a series of dampers movable with and mounted on a reciprocal rod adapted to operatesimultaneous y iao.

to open or close said flue-pipes, and means connected to said rod andadapted to regulate said by-pass.

3. A bake oven comprising a bakingchamber, a movable hearth therefor, aseries of flue-pipes extending horizontally through the upper portion ofsaid chamber, a bypass, a union mixing chamber arranged transverselyacross one end of said oven above said'baking chamber from which saidflue-pipes receive the products of combus-v tion, and a series ofconnected dampers adapted to operate simultaneously to open or closesaid flue-pipes andare connected -With separate means adapted toregulate said by-pass.

4. A- bake oven comprising a baking I chamber, a movable hearththerefor, a series of flue-pipes extending through the upper portion ofsaid chamber, a by-pass flue, a union mixing chamber arrangedtransversely across one end of said baking chamber from which saidflue-pipes and said bypass receive the products of combustion, alongitudinally reciprocal rod arranged in said mixing chamber, a seriesof dampers mounted uponsaid rod and adapted to operate simultaneously toopen or close said fluepipes, and separate means connected to said rodadapted to regulate said by-pass.

5. A bake oven comprising a baking chamber, a movable hearth therefor, aseries of flue-pipes extending through the upper portion of saidchamber, a by-pass flue, a

union mixing chamber arranged transversely across one end of said bakingchamber'from which said flue-pipes and said bypass receive the productsof combustion, a longitudinally reciprocal rod arranged in said mixingchamber, a series of dampers mounted upon said rod and adapted tooperate simultaneously to open or close said fluepipes, and separatemeans connected to said rod adapted to close said by-pass When saidflue-pipes are open; and vice versa.

In testimony whereof I have hereunto set my hand and seal this 4th dayof February, A, D., 1908. p

WILLIAM FERDINAND PETERSEN.

WVitnesses:

FRANK D. THOMASON, E. K. LUNDY.

